Population analysis of a purebred Hereford and a multibreed synthetic beef cattle herd

International audienc

The world trade center 9/11 disaster and progressive collapse of tall buildings

The collapse of the World Trade Center buildings on September 11, 2001 posed questions on the stability of tall buildings in fire. Understanding the collapse of the WTC Towers offers the opportunity to learn useful engineering lessons in order to improve the design of future tall buildings against fire induced collapse. This paper extends previous research on the modelling of the collapse of the WTC Towers on September 11, 2001 using a newly developed ‘‘structures in fire’’ simulation capability in the open source software framework OpenSees. The simulations carried out are validated by comparisons with previous work and against the findings from the NIST investigation, albeit not in the forensic sense. The column ‘‘pull in’’ that triggers the instability of the structure and leads to collapse is explained. The collapse mechanisms of generic composite tall buildings are also examined. This is achieved through carrying out a detailed parametric study varying the relative stiffness of the column and the floors. The two main mechanisms identified in previous research (weak and strong floor) are reproduced and criteria are established on their occurrence. The analyses performed revealed that the collapse mechanism type depended on the bending stiffness ratio and the number of floors subjected to fire and that the most probable type of failure is the strong floor collapse. The knowledge of these mechanisms is of practical use if stakeholders wish to extend the tenability of a tall building structure in a major fire.Professor Jose Torero and the Open-Sees team at PEER, UC Berkele

The design, construction, and commissioning of the KATRIN experiment

The KArlsruhe TRItium Neutrino (KATRIN) experiment, which aims to make a direct and model-independent determination of the absolute neutrino mass scale, is a complex experiment with many components. More than 15 years ago, we published a technical design report (TDR) [1] to describe the hardware design and requirements to achieve our sensitivity goal of 0.2 eV at 90% C.L. on the neutrino mass. Since then there has been considerable progress, culminating in the publication of first neutrino mass results with the entire beamline operating [2]. In this paper, we document the current state of all completed beamline components (as of the first neutrino mass measurement campaign), demonstrate our ability to reliably and stably control them over long times, and present details on their respective commissioning campaigns

Characterizing binge drinking among U.S. military Veterans receiving a brief alcohol intervention

Background: Brief web-based alcohol interventions (BAIs) are effective for reducing binge drinking in college students and civilian adults, and are increasingly being applied to U.S. military populations. However, little is known about factors associated with binge drinking in Veteran populations and therefore some concern remains on the generalizability of studies supporting BAIs for addressing binge drinking in this population. This study sought to better understand the characteristics (e.g., demographic, coping related mental health factors, prior exposure to traumatic events, and factors assessing motivation to change alcohol use) of a predominantly male sample of binge drinking Veterans receiving a BAI from a VA provider. Methods: A primarily male (93.5%) sample (N=554) of Veterans completed a BAI consisting of brief assessment and personalized feedback. Results: We found that Veterans who were younger, used drugs/alcohol to cope with symptoms of PTSD and depression (e.g., nightmares and flashbacks and sleep difficulties), and had experienced sexual assault, had higher self-reported peak blood alcohol concentration and a higher likelihood for a binge drinking episode in the last 90 days. Conclusions: BAIs may be a promising approach for addressing binge drinking in Veterans. However, binge drinking among a sample of mostly male Veterans receiving a BAI may be associated with a complex set of factors that are less prevalent in the college student population and thus studies demonstrating the efficacy of BAIs with Veterans are needed

Memory Accessibility and Association of Alcohol Use and its Positive Outcomes

Memory processes have been applied increasingly to the understanding of use and abuse of alcohol and other drugs (e.g., Baker, Morse, & Sherman, 1987; Goldman, Brown, Christiansen, & Smith, 1991; MacKinnon & Fenaughty, 1993; Stacy, Dent, et al., 1990; Stacy, Leigh, & Weingardt, 1993). The goal of this research was to examine some of the general predictions from a memory association framework in addiction by using measures that definitely require memory access. To provide background on this topic, we first argue for the importance of memory association and accessibility as potential mediators of alcohol use and summarize a class of theories providing the necessary theoretical support for our predictions regarding these concepts. These general predictions are then evaluated in multiple studies. Finally, we discuss how our findings constitute some of the necessary, but not sufficient, conditions for memory mediation in alcohol use